[ERROR] Unable to access runtimes index at https://www.python.org/ftp/... #355

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1. RogerMarsh commented on May 30, 2026

   

   RogerMarsh

   on May 30, 2026

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   Forgot to mention the 'bundled' directory referenced in the response to the command does not exist.
2. zooba commented on Jun 1, 2026

   

   zooba

   on Jun 1, 2026

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   So the URL for FTP root actually has a slash at the end, and if you omit that then you get a 404. The index is definitely there.

   And the bundled directory is intentionally omitted from the MSI (that should be documented somewhere, but it'll be an obscure note for administrators, not a normal user concern).

   The problem appears to be that Wine does not support any of the WinHTTP APIs that we use for downloads. We don't officially support Wine, so there's nothing we're going to do about it, but what you might be able to do is copy the urllib directory from a Python 3.14 Lib into the runtime directory, and also the _ssl.pyd and _socket.pyd. That ought to be enough for the urllib fallback to enable, and I'm pretty sure the socket module works okay under Wine.

   We don't include that by default because we don't want to be subjected to OpenSSL's vulnerabilities, since they force us to release updates every time they do. As long as we only use Windows's own APIs, users will get the fixes automatically.

   Hopefully that's helpful! Good luck
3. zooba commented on Jun 1, 2026

   

   zooba

   on Jun 1, 2026

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   Also, if you'd like to package together a Wine-compatible version of the install manager, feel free. We won't distribute it from python.org, to avoid confusing the vast majority of users (who are not on Wine), but you're fine to distribute it anywhere you like.

   And a side note: you'll want py exec -3.7 with a dot, since just -37 won't match (there's no Python thirty seven out yet 😉 )
4. Jawzper commented on Jun 19, 2026

   

   Jawzper

   on Jun 19, 2026

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   Hi, I'm running into the same issue trying to get a bundled python application working under wine (it's a utility for another application I have to run in that wine instance, so it needs to run in the same environment).

   So I am trying your suggestion... I found urllib in my pyenv 3.14 directory and copied that to the runtime dir, but where can I get _ssl.pyd and _socket.pyd from? I could not locate them.

   Also, what can I do about missing "runtimes index" file fallback-index.json? The /bundled folder it's supposed to be in does not exist at all, as far as I can tell.
5. zooba commented on Jun 19, 2026

   

   zooba

   on Jun 19, 2026

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   where can I get _ssl.pyd and _socket.pyd from?

   They are part of a normal Windows distribution of Python, usually in the DLLs directory.

   what can I do about missing "runtimes index" file fallback-index.json?

   You can create it or ignore the error. In the MSIX package, it's present so that users can always get the latest version of Python without needing network, but it's omitted from the MSI to reduce the size and allow/encourage administrators to bundle their own preferred defaults.